Bar slitting and stretching machine.



No. 766,180. PATENTED AUG. 2, 1904.

J. F. GOLDING. BAR SLITTING AND STRETOHING MACHINE.

APPLICATION FILIIDOGT. 10, 1903 H0 MODEL. 3 SHEBTSSHBET l.

W/ TNESSES: INVENTOI? fl 0m ATTORNEY PATENTED AUG. 2, 1904.

J. F. GOLDING.

BAR SLITTING AND STRETGHING MACHINE.

APPLIOATION FILED OUT. 10, 1903.

3 SHEETS-SHEET 2.

N0 MODEL.

INVENTOH Jrn a? WITNESSES:

A 770/?NE Y PATENTED AUG. 2, 1904.

J. F. GOLDING.

BAR SLITTING AND STRETGHING MACHINE APPLICATION FILED 00T.10. 1903.

3 SHEBTS-SHBET 3.

N0 MODEL.

J'mm $15M Patented August 2, 1904.

UNITED STATES PATENT FEIcE.

JOHN F. GOLDING, OF NEIV YORK, N. Y.

BAR SLITTING AND STRETCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 766,180, dated August 2, 1904.

Application filed October 10, 1903.

T0 (til whmu/ it lit/by concern:

Be it known that I, Joufx F. Genome, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certainnew and useful Improvements in Bar Slitting and Stretching Machines, of which the following is a specification.

My invention is adapted for the cutting and bending of sheet metal, (the term sheet metal here including plates and bars of considerable thickness) and is especially designed for the protection of tension-bars used in concrete and cement, in which bars loops, bends, or eyes are formed to give the surrounding mass a secure hold. The invention is not, however, confined to this particular manufacture.

The invention consists .in the parts and combinations thereof hereinafter set forth and claimed.

In order to make the invention more clearly understood, I have shown in the accompanying drawings means for carrying the same into practical effect without limiting my improvement in their useful applications to the particular constructions which for the purpose of illustration I have delineated.

In said drawings, Figure 1 is a plan view of a metal cutting and bending machine embodying my invention. Fig. 2 is an end view of the same. Fig. 3 is a vertical section on the line III, Fig. 2. Fig. #1 is a vertical section on line IV, Fig. 3, the parts being in a different position. Fig. 5 is a similar section showing only the cutters and cutter-carriers and embodying a modification. Figs. 6, 7, and 8 illustrate a modification of the invention adapted for cutters reciprocating in right lines.

Referring to the drawings, A is a supporting-frame of any suitable arrangement, construction, and material having the necessary strength. In the construction shown said frame is formed with legs 1 and a bed-plate 2. At the receiving end of,the machine is fixed on the bed 2 by bolts 3 a bolster- 1, having feedopening 5, through which the bar or plate X to be operated on may enter. At the delivery end of the machine is similarly mounted a bolster 6, having a delivery-opening '7, through Serial No. 176,496. (No model.)

which the finished (cut and bent) material or bar X may pass out. In said bolsters are mounted by their journals 8 the parallel rocking cutter-carriers B B, so arranged that the plate X may pass between them parallel and on about a level with their axes. Suitable means for rocking said carriers so that their opposing faces shall turn in different directions are provided, consisting, preferably, of cranks 9, fixed on two of the journals 8 by keys 10. These cranks are united by a connecting-rod 11 and simultaneously operated by a pitman 12 from a crank-wheel 13. The latter is fixed on a counter-shaft 1 1, mounted in bearings 15, rising from the plate 2, and said shaft is held in place by a collar 16 and rotated by suitable power devices. (Not shown.) The continuous rotation of the shaft 14 causes the inner face of the carrier B to rock upward, while the opposing face of the carrier B rocks downward, and vice versa. A cutting and bending operation on the plate X takes place at each of these motions in whichever direction. To attain this end, the carriers B B are provided with upper cutters 17 and 18 and with lower cutters 19 and 20, all arranged so that the cutter 1T cooperates with the cutter 20 on one stroke or rock of the carriers and the cutter 18 acts with the cutter 19 on the return stroke. Each cutter is shown as of a V shape, having a point or projection 21 extending in the direction of the operative movement of the cutter and cutting edges 22. In operation the points of each pair of coacting cutters as they move toward each other encounter the bar X on opposite sides, bite through the same to form a longitudinal slit, and pass each other sufliciently to bend the separated portions of the bar into the form of upward and downward loops 23, thus producing an eye 21 in the bar. The successive repeti tion of this operation, the cutters alternating in action, as described, produces a bar X, having aseries of eyes, as seen in Fig. 3. This involves a stretching of the material at 23, but leaves between the eyes 24: portions 25 of the bar unstretched and alternating with the eyes. The eyes illustrated are of lozenge shape; but different bends and shapes may be produced, according to the shape of the cutters, and it will be understood that the invention is not limited to cutters of the particular shape shown. In Fig. 4 the cutters 18 and 19 are shown as having completed their operative stroke, having slit the bar and produced the loops 23, while the cutters l7 and 20 are at their points of widest separation. In Fig. 3 an earlier stage of the operation is shown, the cutter 18 having just encountered the bar X on the upper side, the lower cutter 20 being also in engagement with the lower side of the bar. On the return stroke of that pair of cutters which have just completed their operation on the bar and as soon as they have moved apart sufficiently to clear the bends last formed the bar X is fed forward from left to right in Fig. 3, such feeding being efiec'ted by any suitable means. WVhile the invention is not confined to use with a handfeed, I have illustrated it as adapted for such feed, the bar X being manipulated and advanced by a boy or other operative. To attain uniformity in the distances between the eyes, the bar X may be preliminarily chalked at uniform intervals and fed by such chalk marks; but other preferred means for this purpose may be employed.

It is important to properly and securely hold the bar X in position during the cutting and bending operation, the latter tending to twist or turn the bar out of its normal plane,

and for this purpose I have provided holding means about to be described, though other suitable holding devices may be employed with the novel cutting and bending 'mechanism above set forth.

26 and 27 are a pair of holders acting above and below the bar X and engaging the same at a point near the cutters and at the rear of the place of their operation, and 28 29 are a similar pair of holders engaging the bar in like manner in advance of the place of cutting. The said holders are, in effect, levers pivoted at 30 on brackets 31, extending inward from the bolsters 4 and 6. The holders 26 27 are caused to bite closely on the bar at a point in line or nearly in line between their pivots 30 by springs 32, which press inward on the arms 33 of the holders, which arms extend beyond the pivots. Said springs are arranged to react against the bolster 4. The levers or holders are limited in their movement by stop-pins 34, fixed in the bolster. Like the holders 26 27, the holders 28 29 are caused to have a tendency to move in a direction opposite to the feed of the bar X by springs 35, which connect the outer arms 36 of the holders with the bolster 6, and this movement is limited by stop-pins 37 fixed in the bolster. It is apparent that the yielding of the springs 32 and will allow the bar X to pass freely in the direction of its desired feed and a further yielding of the springs 35 permits the holders 28 29 to take the position shown in dotted lines in Fig. 3 to give free ing or twisting pressure of the bar to be exerted in lines directly toward their pivots or approximately so.

In Fig. 5 I have shown a pair of carriers each provided with an extra pair of cutters I 17, 18, 19, and 20', which may be brought into operative position in place of the cutters 17, 18, 19, and 20 by adjusting the carriers around their axes for the proper angles. To allow of such adjustment and the securing of the carriers in their new positions, additional seats 38 for the keys 10 are provided in the journals 8, Fig. 2. The cutters may all be similar and changed, as above described, to bring sharper cutters into operation, or the cutters 17, 18, 19, and 20 may be of different size or shape from the cutters 17, 18, 19, and 20, so that said change will effect a difference in the product, such as making the eyes 24 larger or smaller or of different shape.

Other suitable supporting and actuating means than those which I have thus far described may be employed for the cutters. Thus they may be mounted in guides and reciprocated inright lines with a sliding movement. I have illustrated such an arrangement in Figs. 6, 7, and 8, in which 47 and 49 indicate a pair of cutters arranged above and below the feed-path of the bar X and mounted on a slide 51, which reciprocates in aguide 62. 53 is a similar slide which is arranged to be moved oppositely to the slide 5lthat is to say, the slide or carrier 53 moves downward while the slide or carrier 51 is moving upward, and vice versa. 48 and 50 are upper and lower cutters fixed on the carrier 53. Any well-known actuating mechanism-for instance, that shown at M may be employed for moving the carriers 51 and 53, as described. At 54 is shown the guide for the carrier 53. The said cutters are formed with metal-bending projections 55 and cutting edges 56 along the inner sides of said projections, so that said cutters operate, as indicated in Figs. 6 and 7, to slit and bend the metal in the manner already described in connection with the cutters 17, 18, 19, and 20. The cutter 48 cooperates with the cutter 49 on one stroke of the machine, and the bar X having been fed forward the cutter 47 006perates with the cutter 50. The finished product is or may be the same as that shown at the right hand of Fig. 3.

The invention may be embodied as to some features of it in a more simple form of machine which will be efiicient, but which will manufacture the desired product less rapidly. Such form of the invention would be represented by omitting the cutters 48 and 49, so

that the machine would cut on the forward stroke only and do no cutting While the cutters are returning to their outer positions. This finished product of this latter singlestroke machine will be substantially, but not exactly, like the cyebarshown in Fig. 3, for the upward bends will all be at one edge of the bar and the downward bends will all be at the other edge of the bar. The cutting and bending means (shown in Figs. 6 and T) are or may be used in combination with the holders already described or other equivalent holding means.

57 is a clutch controlled by a spring 58 and a treadle 59 and adapted to engage a stop 60 on the shaft 61 of the mechanism M. By this clutch the shaft may be caused to come to rest at a point which will leave the cutters IT and IS equally elevated and leave an opening for the introduction of the bar X.

I have shown the carriers BB as solid cylinders formed with recesses 39, in which the cutters tit, and abut against shoulders IO, being secured by screws I1, and this construction is zulvantageous in that it causes the cutters and carriers to be unyielding and keeps the cutting edges on the cutting-line; but other forms of carriers may be employed, so as they properly hold and move the cutters.

I enable the arc of rocking to be changed according to the product desired or the size of the cutters. A means of adjustment for this purpose consists in slots 42 in the cranks 9, in which the crank-pins *3 may be adjusted toward or from the axes of the rocking carriers, and in a slot 45 in the crank-wheel 13, along which the wrist-pin 46 may be adjusted to change the length of the stroke of the pitman 12.

The bar-engaging edges of the holders are preferably as wide as the bar, so as to have the greatest etticiency in holding the bar from turning.

The cutting edges 22 are helical relatively to the axes of their carriers, so that they come accurately to a common cutting line or plane without space between the edges of coacting cutters.

iVhat I claim is 1. In a metal-slitting machine the combination of two rocking cutters arranged to come to a common cutting-line and to pass beyond it, and means for rocking said cutters in the' same direction, whereby material may be fed between said cutters in a direction parallel with their axes and slitted at intervals, substantially as set forth.

2. The combination of two rocking cutters arranged to come to a common cutting-line and to pass beyond it, and means for rocking said cutters in the same direction, each cutter being formed with a projection and cutting edges leading away from said projection, substantially as set forth.

3. In a metal-slitting machine the combination of two rocking carriers side by side, each provided with a pair of cutters, a cutter of one carrier and a cutter on the other carrier being arranged to come to a common cuttinglinc, and the other two cutters being adapted to come to a common cutting-line in alternation with the first cutters as the carriers are rocked, and means for rocking the carriers simultaneously in the same direction, substantially as set forth.

a. In a metal-slitting machine the combination of two rocking carriers each provided with a pair of cutters, said cutters being arranged to cooperate alternately one with another as described when the carriers are rocked, and means for rocking the carriers, each cutter having a projection and cutting edges leading from such projection, substantially as set forth.

The combination of the rocking carriers B, B having opposing pairs of cutters arranged for alternate operation, said cutters having bending projections and cutting edges leading away from such projections, and means for rocking the carriers, substantially as set forth.

6. In a metal-slitting machine the combination of two opposing pairs of rocking cutters arranged for alternate operation as described, said cutters having bending projections and cutting edges, crank connections between the two pairs of said cutters, and means for rocking the cutters, substantially as set forth.

7. The combination of two opposing rocking cutters each having a bending projection and cutting edges leading therefrom, and holders forming a feeding-path leading between said cutters in a direction parallel with the axes of the cutters, substantially as set forth.

8. The combination with the opposing cutters arranged for slitting, and means for operating the same, of movable holders situated along the path of the material to be cut, said holders acting to prevent the twisting of the material and yielding in the direction of the feed, substantially as set forth.

9. The combination of opposing cutters arranged for slitting and having bending projections and cutting edges, means for actuating said cutters, and movable automaticallyacting holders situated by the feed-path of the material, said holders operating to hold the material from turning on its longitudinal axis and yielding in the direction of the feed movement, substantially as set forth.

10. The combination of opposing cutters arranged for slitting and having bending projections and cutting edges, rocking supports or carriers for said cutters, means for rocking said supports, and pivoted automatically-acting holders situated by the feed-path of the material and operating to hold the material from turning on its longitudinal axis, the presence of the material in its tendency to turn being substantially in the lines of the pivots of the holders.

11. The combination of opposing cutters, rocking carriers for the same, the said cutters having bending projections and cutting edges leading therefrom, mechanism for rocking the carriers in the same direction, and means for adjusting the arc of rocking of the carriers.

12.. The combination of two rocking carriers arranged side by side on parallel axes, tWo pairs of opposing cutters on said carriers, adapted for alternate operation, means for rocking said carriers, two other pairs of cutters on said carriers, and means for adjusting the carriers around their axes to substitute in operative position the latter cutters for the first-mentioned cutters.

13. In a metal slitting and bending machine the combination of two opposing cutters having metalbending projections and cutting edges leading from said projections arranged to cometo a common cutting-line, and adapted to be moved toward and from each other, while the material is fed along between said cutters in a direction parallel with the line of cutting, substantially as set forth.

1 1. In a metal slitting and bending machine the combination of two opposing pairs of cutters having bending projections, and cutting edges leading from said projections arranged to come to a common cutting-line, said outters being adapted to cooperate alternately described, mechanism for rocking said cutter,

and suitable opposing cutting means, the Whole being arranged for the feeding of the material along and substantially in the direction of the cutting edges.

16. In a metal slitting and bending machine the combination of opposing cutters arranged to mutually out along a line to produce aslit, one of said cutters having cutting edges inclined to each other and metal-bending portions which extend laterally from each of said cutting edges and enter the metal at the side of the slit to stretch the metal in a loop from one end to the other of the slit, and means for actuating one of said cutters, the whole being arranged for the feeding of the material in a direction substantially parallel with the line of cutting, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN F. GOLDING.

Witnesses: I

MERRILL WATSON, LYMAN S. STONE. 

